Pipe line pressure neutralizer



Feb. 13, 1940 P, McMU RRY PIPE LINE PRESSURE NEUTRALIZER Filed Aug. 8, 19:59

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Patented Feb. 13, 1940 UNITED STATES PATENT OFFICE I PIPE LINE PRESSURE NEUTRALIZER I Paul E. McMurry, Concordia, Kans. Application August 8, 1939, Serial No. 289,063

,1 Claim. (01. awn-54) A check valve l2, preferably a ball, is mounted for movement in the bore 8 and is held closed on the seat 8 by a compression s ring I l disposed in the bore 8. Y Into the upper end of the bore 8 is threaded an adjuster I5 having a screw driver 5 kerf, the adjuster bearing against the upper end of the spring M and constituting a means where- This invention aims to provide a simple but effective means for relieving undue pressure on one side of a valve in a pipe line, the construcing no exposed and readily accessible parts promoting an unauthorized, tampering with the structure. A further object of the invention is to supply'a device of the class described which is so constructed that there will be no practical tendency for the collection of sediment and ti e like.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present in.- vention appertains,

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it

. being understood thatchangesin the precise embodiment of the invention herein disclosed, may

be made Within the scope of What is claimed,

without departing from the spirit of the invention. l

In the accompanying drawing:

Fig. 1 shows in vertical section, a device constructed in accordance with. the invention;

Fig, 2 is a sectional View wherein parts depicted in Fig. 1 are shown on an enlarged scale.

The numeral 1 indicates a pipe line, in which I may be threaded into a neck 5 'detachably con- 40 nected, by threading or otherwise,-with the casing 2, and forming a portion thereof,

In its upper edge, referring to Fig. 1, the gate valve 3 is supplied with a dovetailed groove 6,

, extended entirely across the valve from side to- The groove 6 is adapted to receive a side. tapered, circular stud l 'on the lower endof' the stem 4:

The gate valve 3 is supplied with a longitu-' dinal bore 8, at the lower end of which there is a seat 9. Atransverse inlet port |0,located on one side of the gate valve 3, leads to the seat 9 and the bore 8. The gate-valve 3 has an outlet port H spaced from the port ll] and opening in a diopens.

rection opposite to that in which the port 10,

may be regulated at by the effort of the spring on the ball valve 1?."

the will of an operator.

In practical operation, if there is undue pressure on the left han d side of the gate valve 3 in Fig. .1, that pressure will find an exit to the right hand side of th e valve, by way of the port Hi, the bore 8 and the port l l, the ball valve'lt opening, against the actionof the spring M, to

is assembled with the gate valve for displacement relatively. to the gate valve, at the Will of an operator, said means guarding the adjuster i5 and rendering it inaccessible until the aforesaid displacement is accomplished.

Reduced toterms of structure,it is to be observed that the adjuster l5 lies beneath the stud l on the stem 4', and,

v therefore, tampering rendered diflicult. It access to the adjuster ing apart, and sliding l on the lower end The device forming the subject matter of this application is simple with the adjuster l will be is possible, however, togain by taking the valve casthe gate valve 3 off the stud f the stem 4.

in construction but will. be

found thoroughly advantageous and practical for the ends in view.

Having thus described the, invention, what is claimed is: I

Pressure release me casing, a gate valve having a longitudina chanism comprising a valve slidable in the casing and l bore, there being a valve seat at one end of the bore, the gate valve having oppositely-opening ports, one of which communicates with thebore, by Way of the valve seat, a check valve in the boreand cooperating with the located in the bore,

seat, a closing spring for the check, valve and one end of the spring comounted in the, bore and cooperating with the opposite end of the spring, and means for operthe gate valve for .ating the valve, said means being assembled with displacement relatively to the gate valve, at the Will of an operator, said means guarding the adjuster and rendering it inaccessibleuntil the aforesaid displacement isv accomplished.

"PAUL E. MCMURRY. 

